const int pinSwCnt   = A1; //入力スイッチ

//7セグピン
const int pin7segA  = 6;
const int pin7segB  = 7;
const int pin7segC  = 8;
const int pin7segD  = 9;
const int pin7segE  = 10;
const int pin7segF  = 12;
const int pin7segG  = 13;

//7セグ桁制御
const int pin7segDig1 = A3;
const int pin7segDig2 = 2;
const int pin7segDig3 = 3;
const int pin7segDig4 = 4;

//時間操作スイッチエッジ検出
int swCntPrevState = 0;  //1つ前のスイッチ状態
int swCntCurrState = 0;  //現在のスイッチ状態
int swCntUpEdge    = 0;  //立ち上がりエッジ検出
int pushSingle = 0; //1回押された判定
int pushDouble = 0; //2回押された判定

//時間
long timeNow;  //現在時刻
long timeStart;  //タイマー開始時刻
long timeStop; //一時停止時刻
long timeUpEdge; //立ち上がりエッジを検出した時間
int  numUpEdge = 0;//立ち上がりエッジを検出した回数
int timeDisp;  //表示時刻
int setTime = 60; //設定時刻(秒単位)
int  numDisp[4];  //LEDに表示する数字
int  i;

int timeState=0; //タイマー状態 0:停止 1:動作 2:完了 3:停止

void setup()
{
  //入出力の初期化
  pinMode( pinSwCnt, INPUT );

  pinMode( pin7segA,  OUTPUT );
  pinMode( pin7segB,  OUTPUT );
  pinMode( pin7segC,  OUTPUT );
  pinMode( pin7segD,  OUTPUT );
  pinMode( pin7segE,  OUTPUT );
  pinMode( pin7segF,  OUTPUT );
  pinMode( pin7segG,  OUTPUT );

  pinMode( pin7segDig1,  OUTPUT );
  pinMode( pin7segDig2,  OUTPUT );
  pinMode( pin7segDig3,  OUTPUT );
  pinMode( pin7segDig4,  OUTPUT );
  
}

void loop()
{
  timeNow = millis();  //現在時刻の取得


  //時間操作スイッチ立ち上がりエッジ検出
  swCntCurrState = digitalRead(pinSwCnt); //現在のスイッチ状態
  if( swCntCurrState==HIGH && swCntCurrState!=swCntPrevState ){ //現在のスイッチ状態と一つ前のスイッチ状態を比較
    swCntUpEdge = 1;
    if( numUpEdge == 0 )
      timeUpEdge = timeNow;
    numUpEdge++;
  }
  else
    swCntUpEdge = 0;
  swCntPrevState = swCntCurrState; //一つ前のスイッチ状態
  
  //スイッチの押された回数が1回か2回かの判定
  if( numUpEdge >= 1 ){
    if( numUpEdge >= 2 ){
      pushDouble = 1;
      numUpEdge = 0;
    }
    else if( timeNow-timeUpEdge > 600 ){
      pushSingle = 1;
      numUpEdge = 0;
    }
  }

  //状態の判定
  switch(timeState){
    case 1: //動作
     if( pushSingle == 1 ){
       timeState = 3;
       timeStop = timeNow;
     }
     else if( (timeNow-timeStart)/1000>=(setTime) ){
       timeState = 2;
     }
     break;
  
    case 2: //完了
     if( pushSingle==1 || pushDouble==1 ){
       timeState = 0;
     }
     break;
  
    case 3: //停止
     if( pushSingle==1 ){
       timeState = 1;
       timeStart = timeNow - (timeStop-timeStart); //開始時刻を停止していた時間の分だけ進める
     }
     else if( pushDouble == 1 ){
       timeState = 0;
     }
     break;
  
   default : //初期
     if( pushSingle == 1 ){
       timeState = 1;
       timeStart = timeNow;
     }
     break;
  }

  switch(timeState){
    case 1: //動作
      timeDisp = setTime -( (timeNow-timeStart)/1000 );  //設定値から現在時刻と開始時刻の差を引いた値が表示時刻
      break;
  
    case 2: //完了
      timeDisp = 0;
      break;
  
    case 3: //停止
      timeDisp = setTime -( (timeStop-timeStart)/1000 );  //設定値から現在時刻と停止時刻の差を引いた値が表示時刻
      break;
  
   default : //初期
     timeDisp = setTime;
     break;
  }

  //表示時刻をLEDの数字へ変更
  numDisp[0] = timeDisp % 10;
  numDisp[1] = ( timeDisp % 60 )/10;
  numDisp[2] = (timeDisp/60) % 10;
  numDisp[3] = (timeDisp/600) % 10;
  
  pushSingle = 0;
  pushDouble = 0;
  
  
  //7セグLEDの制御
  for( i=0; i<4; i++ ){
    switch(i){
      case 1:
        digitalWrite(pin7segDig4  , HIGH  );
        digitalWrite(pin7segDig3  , LOW   );
        digitalWrite(pin7segDig2  , HIGH  );
        digitalWrite(pin7segDig1  , HIGH  );
        break;
    
      case 2:
        digitalWrite(pin7segDig4  , HIGH  );
        digitalWrite(pin7segDig3  , HIGH  );
        digitalWrite(pin7segDig2  , LOW   );
        digitalWrite(pin7segDig1  , HIGH  );
        break;
    
      case 3:
        digitalWrite(pin7segDig4  , HIGH  );
        digitalWrite(pin7segDig3  , HIGH  );
        digitalWrite(pin7segDig2  , HIGH  );
        digitalWrite(pin7segDig1  , LOW   );
        break;
    
     default :
        digitalWrite(pin7segDig4  , LOW   );
        digitalWrite(pin7segDig3  , HIGH  );
        digitalWrite(pin7segDig2  , HIGH  );
        digitalWrite(pin7segDig1  , HIGH  );
        break;
    }

    switch(numDisp[i]){
      case 1:
        digitalWrite(pin7segA  , LOW  );
        digitalWrite(pin7segB  , HIGH );
        digitalWrite(pin7segC  , HIGH );
        digitalWrite(pin7segD  , LOW  );
        digitalWrite(pin7segE  , LOW  );
        digitalWrite(pin7segF  , LOW  );
        digitalWrite(pin7segG  , LOW  );
        break;
    
      case 2:
        digitalWrite(pin7segA  , HIGH );
        digitalWrite(pin7segB  , HIGH );
        digitalWrite(pin7segC  , LOW  );
        digitalWrite(pin7segD  , HIGH );
        digitalWrite(pin7segE  , HIGH );
        digitalWrite(pin7segF  , LOW  );
        digitalWrite(pin7segG  , HIGH );
        break;
    
      case 3:
        digitalWrite(pin7segA  , HIGH );
        digitalWrite(pin7segB  , HIGH );
        digitalWrite(pin7segC  , HIGH );
        digitalWrite(pin7segD  , HIGH );
        digitalWrite(pin7segE  , LOW  );
        digitalWrite(pin7segF  , LOW  );
        digitalWrite(pin7segG  , HIGH );
        break;
    
      case 4:
        digitalWrite(pin7segA  , LOW  );
        digitalWrite(pin7segB  , HIGH );
        digitalWrite(pin7segC  , HIGH );
        digitalWrite(pin7segD  , LOW  );
        digitalWrite(pin7segE  , LOW  );
        digitalWrite(pin7segF  , HIGH );
        digitalWrite(pin7segG  , HIGH );
        break;
    
      case 5:
        digitalWrite(pin7segA  , HIGH );
        digitalWrite(pin7segB  , LOW  );
        digitalWrite(pin7segC  , HIGH );
        digitalWrite(pin7segD  , HIGH );
        digitalWrite(pin7segE  , LOW  );
        digitalWrite(pin7segF  , HIGH );
        digitalWrite(pin7segG  , HIGH );
        break;
    
      case 6:
        digitalWrite(pin7segA  , HIGH );
        digitalWrite(pin7segB  , LOW  );
        digitalWrite(pin7segC  , HIGH );
        digitalWrite(pin7segD  , HIGH );
        digitalWrite(pin7segE  , HIGH );
        digitalWrite(pin7segF  , HIGH );
        digitalWrite(pin7segG  , HIGH );
        break;
    
      case 7:
        digitalWrite(pin7segA  , HIGH );
        digitalWrite(pin7segB  , HIGH );
        digitalWrite(pin7segC  , HIGH );
        digitalWrite(pin7segD  , LOW  );
        digitalWrite(pin7segE  , LOW  );
        digitalWrite(pin7segF  , HIGH );
        digitalWrite(pin7segG  , LOW  );
        break;
    
      case 8:
        digitalWrite(pin7segA  , HIGH );
        digitalWrite(pin7segB  , HIGH );
        digitalWrite(pin7segC  , HIGH );
        digitalWrite(pin7segD  , HIGH );
        digitalWrite(pin7segE  , HIGH );
        digitalWrite(pin7segF  , HIGH );
        digitalWrite(pin7segG  , HIGH );
        break;
    
      case 9:
        digitalWrite(pin7segA  , HIGH );
        digitalWrite(pin7segB  , HIGH );
        digitalWrite(pin7segC  , HIGH );
        digitalWrite(pin7segD  , HIGH );
        digitalWrite(pin7segE  , LOW  );
        digitalWrite(pin7segF  , HIGH );
        digitalWrite(pin7segG  , HIGH );
        break;
    
      default :  //0
        digitalWrite(pin7segA  , HIGH );
        digitalWrite(pin7segB  , HIGH );
        digitalWrite(pin7segC  , HIGH );
        digitalWrite(pin7segD  , HIGH );
        digitalWrite(pin7segE  , HIGH );
        digitalWrite(pin7segF  , HIGH );
        digitalWrite(pin7segG  , LOW  );
        break;
    }

    delay(5);
  }
}